Physical Oceanography, Vol.
5, January, 2011 (Ukrainian Original No.
5, September–October, 2010)
FIELD STUDIES OF THE MOTION OF SEDIMENTS
IN THE COASTAL ZONE OF THE SEA
V. Z . D y k m a n ,
O. I. Efremov,
and E. V. Man’kovskaya
We present the results of measurements carried out with the help of the “Donnaya Stantsiya” complex of
equipment in the coastal zone of the Crimean shelf near Evpatoriya and near the southeast end of the
Kosa Tuzla Island. For the same intensity of winds in these regions, the intensities of waves and turbu-
lence in the coastal zone near Evpatoriya are much higher and, hence, the fluxes of suspended sediments
are more intense. The accumulated data are intended for the correction of the kinetic model used for the
evaluation of the characteristics of the field of suspended sediments in the shallow-water areas.
The upper or coastal part of the shelf is characterized by the fact that it suffers the action of waves of all in-
tensities. The dynamic processes typical of the deep sea are much more intense and available for observations in
the shallow-water regions. One of the main problems is connected with the investigation of regularities of the
transport of sand sediments in the shallow-water areas under the action of waves. The processes of interaction
of the liquid and solid phases are quite complicated and have no rigorous mathematical description up to now.
Hence, the main method of investigations is the construction of various physical models of the analyzed phe-
The models used for the description of the flows of liquid containing suspended solid particles can be con-
ventionally split into hydrodynamic and kinetic. In the hydrodynamic models, suspensions are regarded as inte-
gral objects characterized by the parameters of concentration and sedimentation rate averaged over the granulo-
metric composition. Models of this sort are well developed and successfully applied. As a confirmation, we can
mention one of the most significant works  in which specific computational schemes and recommendations
concerning the prediction of the dynamics of sediments in the coastal zone of the sea are developed on the basis
of a vast array of the experimental data combined with the analysis of available theoretical concepts. The practi-
cal application of the proposed model gave clear positive results (see, e.g., ).
At the same time, some important aspects of the motion of sediments, in particular, the distribution of con-
centration of suspended solid substances over the depth remain poorly studied up to now. In the work , the
results of the numerical analyses of the vertical distribution of the concentration of suspension performed within
the framework of various hydrodynamic models are compared with the experimental data obtained by using of
an acoustic profilometer. In the cited work, the authors consider three models: the diffusion model in which the
vertical flux of suspension is found as the product of the gradient of its concentration by the coefficient of turbu-
lent viscosity, the convection model in which the vertical transport of particles is realized by separate eddies
guaranteeing the formation of a certain mean velocity of convective motion of the suspension in the direction
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine.
Corresponding author; e-mail: email@example.com.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
65–80, September–October, 2010. Original article submitted May 26, 2009;
revision submitted June 30, 2009.
0928–5105/11/2005–0379 © 2011 Springer Science+Business Media, Inc. 379